Pumping machinery.



M. T. 6. M. C. CHAPMAN.

PUMPING MACHINERY.

APPLICATION YFILED MAY 16. 1910.

1,169,772. Patented Feb. 1, 1916.

2 SHEETS-$HEET l- ZZZ/7763385 h ofzzfier/fazm lvl. 1.6L M. C. CHAPMAN.

PUMPING MACHINERY.

APPLICATION FILED MAY 16. 1910.

1,169,772. Patented Feb. 1, 1916.

2 SHEETSSHEET 2.

a the bed-plate of the rod section 15, as shown in Fig. 1.

UNITED STATES PATENT OFFICE.

MATTHEW T. CHAPMAN AND MARK C. CHAPMAN, OF AURORA, ILLINOIS, ASSIGNORS TO THE AMERICAN WELL WORKS, 0F AURORA, ILLINOIS, A CORPORATION OF ILLINOIS.

PUMPING MACHINERY.

Specification of Letters Patent.

' Application filed May 16, 1910. Serial No.'561,587.

invented certain new and useful Improvements in Pumping Machinery, of which the following is a specification, reference being had to the accompanying drawings.

Our invention relates to pumping machinery such as is employed in pumping water from deep wells, and has for its object'to provide certain improvements in the construction and operation of such apparatus.

One of the objects of our invention is to overcome the side draft incident to the use of a crank acting directly upon the pumprod as has heretofore been the general practice in deep well pumping machinery.

Another object is to provide pumping mechanism of such construction that a longer stroke is secured.

A still further object is to provide means for balancing the weight of the pump-rod or ro s as well as the weight of the water, therebf equalizing the load so that the action of e pump may be made more nearly uniform.

We ace" plish these objects as illustrated in the drayvings and. as hereinafter described. i, i

That whiclfjve regard as new is set forth in the claims. "1 v In the accompanying drawings, Figure 1 is a side elevation of our improved pumprod operating mechanism; Fig. 2 is a plan view thereof; Fig. 3 is a vertical cross-section on line'33 of Fig. 2; and Fig. 4 is anelevation of the parts-shown in Fig. 3.

partly broken away.

Referring to the drawings, 12 indicates umping mechanism, which rests on a su table foundation 13 placed over the .well. 14 indicates a pistonrod which forms the upper end of the pump-v rod and is secured to the uppermost pusmpd:

a1 piston-rod works through a suitable bearing 16 carried by the bed-plate and is secured at its upper end to a cross-head 17, the ends of which are fitted to suitable hearings to receive upright guide-rods 18 19 which rise from the bed; plate and are secured together at their upper ends by a cross-bar 20, as best shown in Fig. 1. The cross-head 17 is provided with a recess at the center to receive the upper end of the piston-rod 14, said rod being secured in place by a detachable plate 21 secured by bolts 22. Thus the pump-rod may readily be disconnected from the cross-head 17 when desired. The ends of the cross-head 17 are projected laterally so that the bearings of the rods 18 19 lie in a vertical plane which is at one side of the piston-rod 14.

23 24 indicate gears which are mounted on parallel shafts 25 26, respectively, supported by a suitable frame 27, said gears being arranged to intermesh' so that they opcrate in unison. Said gears are mounted in a vertical plane at the opposite side of the piston-rod 14 from the guide-rods 18 19, as shown in Fig. 1, and are provided, respectively, with crank-pins 28 29, to which the lower ends of pitmen 30 31 are connected. The upper ends of said pitmen are connected with the ends of the cross-head 17 by pins 32, 33, respectively. By arranging the guide-rods 18 19 in a plane which is at the opposite side of the piston-rod 14 from the plane of the gears 23 24 it will be seen'that said guide-rods do not interfere with the rotation of the gears and the actuation of the pitmen 30 31.

34 35 indicate pinions which mesh with each other and with the gears 23 24, respectively, as shown in Fig. 1, said pinions being mounted on shafts 36 37, respectively,

which are suitably supported by the frame 27, as shown in Fig. 2. One of said shafts,

as 36, is the drive-shaft and is provided with fast and loose pulleys 38 39, or other suitable means, such as a directly-connected motor, for driving the same. By this construction power is applied directly to each other, whether in lifting up or'forci-n'g down the pump-rod. By connecting the driving pinion 34 with the gear 23 and also with the gear 24 through the pinion 35 which meshes with the pinion 34 at the side opposite the gear 23, the pressure upon said driving pin- 1on is equalized.

The pumping apparatus described is intended primarily for use in connection with a double-acting pump, such as those shown and described in the application for patent of Robert E. L.'Holmes, Serial No. 337,321,

' filed October 3, 1906, and the application for patent of Matthew T. Chapman, Serial No.

426,556, filed April 11, 1908, although it may pumping mechcounterbalance segments'are fixedly secured to and keyed upon their respective-shafts in any suitable way so that they rotate with said shafts. They are placed at theopposite sides of their respective shafts from" the crank pins 28 29, respectively, as best shown in Fig. '1. By-this construction by "properly regulating the amount of material placed in the pockets 42 the counterbalancing weights may be made to accurately balance the pump rods so that the power applied for pumping will be uniform for raising the water on both the up and down strokes double-acting pumps, or for the lifting stroke alone in. single-acting-pumps. When used in connection wit a single-acting pump, sufficient weight s ould be added to counterbalance the weight of the rods and also the weight of the water to be lifted. V

43 44 45 46 indicate bracesfsecu'red 0 theupper ends of the guide-rods-18 for roperly bracing them and holding them'rigidly in position. 1

47 48 indicate drums mounted onithe ends of the shafts 25 26 for use in hoisting the pump rods and plungers out of. the well, when the plunger in the well has-become worn and repairs are necessary. In using said drums the piston-rod 14 is suitably secured so that it cannotdrop into the well and the cross-head 17 and pitmen 30 31 are removed. If'desired also the counterbalance weights 40 41 may be disconnectedfrom their respective shafts; Hoisting tackle consisting' of ropes and pulleys is then hung centrally over the well, the loose end of the rope being'wound around one of the drums and the hoisting tackle connected to the piston-rod. By then operating the gears 2324 the pump rods and plunger maybe withdrawn from or lowered into the well.

The construction shown in Fig. 1, in which the gears 23 24 intermesh, is the best embodiment of our invention, but our invention is not limited to a construction in which such gears intermesh since satisfactory results may be secured by driving the gears through the pinions 34 35. The claim hereinafter made should therefore be construed accord ingly. y

By constructing the operating mechanism as described, We avoid side draft and are able to secure a longer stroke for the pump. We also balance the operating mechanism so that the action of the pump is made uniform and smooth, and it is therefore much more efficient than constructions heretoforein use.

Our improved construction of pump may be used for pumpingoil from oil wells or for pumping any other liquid. We wish it to be understood that. our invention is not limited to the specific construction shown and described, except in so far assuch construction is specifically claimed, but includes the use of mechanical. equivalents, and the claims are to be construed accordingly.

That which we claim as our inventiomand desire to secure by Letters Patent, i's', In a pumping mechanism, the combination of a standard; two shafts journaled; therein a short distance apart, intermeshing gears mounted on'said shafts, pitmenyconnected with the .front faces of saidgears, a

oss-head pivotally connected with said pitmen, 'a pumprod connected with said cross-' head midway between the connections ofsaid pitmen thereto, guide rods upon which said cross head .is.- vertically sliclable "'loc ated slightly in advance of said pitmen, and, segmental casings mounted on said shafts-re spectively adapted to be filled more or less for counterbalancing the weight of the pump rod.

MATTHEW T. CHAPMAN. MARK c. CHAPMAN.

Witnesses: I I

B. L. PALMER, H. W. SPILLER. 

